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Bulgaria Bulgaria · Sofia · 42.700, 23.330 (approximate location)

IRT-Sofia

IRT-Sofia, a research reactor (pool) in Sofia, Bulgaria, with 2 MW of thermal power, operated by Inrne-Bas. Shut down, first critical in 1961.

48 pool-type reactors remain in operation today across 28 countries.

Country
Bulgaria
City
Sofia
Type
Pool
Thermal power
2 MW
Operator
Inrne-Bas
Status
Shut down
First criticality
1961

Data: IAEA RRDB · updated on Sep 3, 2026

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